Eyeglass-mounting.



PIA. PERSOHN. EYEGLASS MOUNTING. APPLICATION FILED D20. 30, 1911.

1,030,828., Patented June 25,1912.

"H WINNER! '15 314 m JM :4 $4 #am/n/ 60.

J I rrE s'rATEs PATEN FRANK-A. PERSOHN, OF BALTIMORE, MARYLAND, ASSIGNOR TO BALTIMORE OPTICAL COMPANY, OF BALTIMOR-E, MARYLAND, A CORPORATION OF MARYLAND,

EYEGLASS-MOUNTING.

Specification of Letters Patent.

Patented (11111025, 1912.

Application filed December 30, 1911. Serial No. 668,709.

To all whom time y concern:

Be it known that I, FRANK .A. PEnsoHN, a citizen of the United States, residing at Baltimore, in the State of Maryland, have 5 invented certain new and useful Improvements in Eyeglass- Mounting's, of which the following is a specification.

This invention relates .to improvements in the mountings of eye-glassesor spectacles.

The invention provides improved means on the stud for automatically locking thereto the fixed end of the. sprin that actuates the nose-clamping device, an also provides improved means on the nose-clamp for au- 15 tom'atically locking thereto the free end of the same spring; by, the improvements also the spring may readily be attached or detached by the fingers of ones hand and without pliers or any other tool.

In the accompanying drawings which form a part of this specification, Figure 1 is a rear elevation of a pair of'eyeglasses having mountings that embody my invention. Fig. 2 is a top plan view of the same.

$ Fig. 3 is a bottom plan view, on a larger scale, of the improved mounting applied to the lens for the'left eye. Fig. 4 is a view partly in section on the line 4--4 of Fig. 1, looking from the left toward the, right, and

showing how the free end of the spring engages its special locking device on the nose clamp. Fig. 5 IS an elevation, andpaa'tly a vertical. section through the screw-portion that connects between the bridge and the straps that clip the lens of the right eye, and

shows the improved locking device for the fixed end of the spring. Figs. 6 and 7 show two modifications of the locking device for the fixed end of the spring. Fig. 8 is a perspective View of one nose-clamp and the ver ticalarm, hook and undercut recess.

The numeral, 1, designates a lens; 2, the nose-bridge; 3, the two straps that clip the ,lens; and, 4, the two circular flattened por- .tions connecting between the nose bridge and the two pair of said straps.

,The-finger-pieces, nose guards and the devices of my improvement which together comprise the spring-actuated nose-clamping devices, are of course in duplicate, and thereforea description of oneset only will suiiice for this specification. The circular portion, 4, that connects be- I tween theuose-bridge, 2, and the lens straps, .5 3, has on tog an upward-projectlng hollow stud, 5, and on the bottom a downward-projecting stud, 6; the upper stud, 5, has an in ternal screw-thread that-receives the shank, 7, of the screw whose head, 8, confines the arm, 9, that connects the nose-clamping guard, 10, and the finger piece, 11. In the pres ent instance the said arm, 9, rests on top of the circular portion, 4, and has a round hoie that gives a swiveling fit around the upper stud, 5, but my improvements in the springlocking devices would operate the same whether said arm, 9, is on top or on the bottom. In the structure here shown the nose guard, 10, finger-piece, 11, and connecting arm, 9, are all made of one piece of material, but this is immaterial to myimprovcment for locking the fixed end of the spring to the stud.

The spring, 12, that actuates the nose- This spring maybe a wire or a strip of flat sheet-meta1 coiled; the innermost coil of the spring is bent short as at, 13, see Fig. 3, to project hook-fashion or crosswise of the said coil: this becomes the fixed end of the spring. The outermost coil of the spring terminates in the form of a tangential finger, 14, that is the free end.

' Inpractice the hollow stud, 6, for an eyeglass must bevery thin metal; this necessity arises from the fact that to insure a neat appearance the size oflthe stud is very small. For these reasons unsatisfactory results follow if the very thin metal of the hollow stud should be slit in two places, that is, if a slit be made entirely across the stud at two opposite sides. Thus two slits in a very thin tube would so weaken the structure as to cause it to collapse when subjected to usage. I provide the stud, 6, at one side only with an end slot, 15 the slot is plainly seen in Figs. 3 and 5. Theside of the slot nearestthe lens, 1, is a straightedgeto its lowest extremity; but the side of the slot nearest the nose-bridge has at its extremity a short lateral prong, 16, that points or projects in a direction crosswise ofthe slot, and constitutes a locking device 'to hold and confine the fixed end, 13, of the coiled spring. In operation the innermost coil of the spring surrounds ,the stud, 6, and the bent end, 13,

of this coil enters the slot, 15, and engages in) y kept in locking engagement with the stud by the lateral prong, 16, because the tensionof. the spring itself continually presses said end, 13, against that side of the slot from which the said lateral prong, 16, projects.

It will be seen the stud to which the spring is fixed has on itself no exterior means of "any kind to keep the fixed end of the spring The horizontal arm, 9, that connects the nose-guard, 10, and finger piece, 11, is provided with means for holding andlocking the free end, 14, of the spring. This means is shown in Figs. 1, 3 and 4;, andconsists of a vertical arm, 17 which in the present instance is bent down and pendant from the horizontal arm, 9. The vertical arm, 17 ,has a hook, 18, whose point projects upward, and a recess or undercut, 19, is formed'in the' edge of the said arm and immediately back of the said hook-point, 18. The free end,

14, ofv the spring, 12, projects laterally from the coils around the stud, 6, (see Figs. 3 and enters the hook, 18, and seats in the recess or undercut, 19, where it is'kept seated by its own tension. To prevent the extremity,-20, of the free end of this spring from catchingin something that might disengage it from the undercut, 19, and from the hook, 18, a rigid" tang, 21, is provided;

this tang is'formed pm the vertical arm, 17, and extends parallel with said extremity, 20,

of the free end of the spring and serves as a shield. The spring, 12, can be removed by the fingers of a persons hand, by first releasing the extremity, 20, of the free end Q from the undercut, 19, and then lifting it out that just described, the spring may be inofthe hook, 18, and finally allowing the coils to relax until the fixed 131 151, 13, .releases from the slot, 15, ixrtheystud. By a reverse manipulation of the; finger from serted to its posit-i'o'n'avithoutrecourse to tools of any kind.

.Two modifications in the form of the spring-lockin'g-fdevice on the stud, 6, are.

shown in Fig's. 6' and 7 respectively In Fig.6, instead of a distinct prong projecting or pointing in a direction across the slot, 15, the slot-edge itself has an incline, and the lowermost part of said slot-edge points across the slot; the .bent end, 13, of the lations of parts and the appended claims have been drawn with due regard thereto.

Having thus described my invention what I claim and desire to secure by Letters Patent is,- Y i 1. An eye-glass mounting having in com; bination a nose-bridge; a lens-strap; a hollow stud between said two parts and pro vided at one side only with a slot whose end is open-one edge'of which slot is straight to its extremity the other edge having at its extremity'a lateral prong that points in a direction crosswise of the slot; a pivoted nose-clamp; and a spring surrounding said hollow stud and having-a bent end entered in said slot and engaging the slot-edge that has the prongthe tension ofthe spring itself continually pressing said bent end against that edge, and said prong locking said spring-end in position, and said spring having a free end that actuates the said nose-clamp. p

2. An eye-glass mounting havingin combination a nose-bridge; lens straps; a noseclamp pivoted between said two parts and having a verticalarm provided with; a' hook and an undercut recess in the arm imniediately back of said hook; and a spring having one end fixed and a free end that seats in the said undercut recess back of the hook and said free end kept seated by its own tension and locked or prevented from accidental disengagement by said hook.

In testimony whereof I aflix my signature.- in presence of two witnesses.

FRANK A. PERSOHN; ,IVitfiesses SAMUEL J. FISHER,

JAMES K. P. WILKINSON.

'Copi's of this patent may be obtained tor five cents each, by addressing-the Commissioner of Patents, 9

' Washington, I). 03" 

